Вестник. Серия физическая (Mar 2011)

ACCELERATED UNIVERSE FROM G-ESSENCE

  • F.B. Belisarova,
  • K.K. Yerzhanov,
  • P.Yu. Tsyba,
  • Sh.R. Myrzakul,
  • I.I. Kulnazarov

Journal volume & issue
Vol. 36, no. 1
pp. 86 – 92

Abstract

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In the present work we analyze the g-essence model for the particular Lagrangian: L=R+2[aXn+eY-V(y/,y)]. The g-essence models were proposed recently as an alternative and as a generalization to the scalar k-essence. We have presented the 3 types solutions of the g-essence model. We reconstructed the corresponding potentials and the dynamics of the scalar and fermionic fields according the evolution of the scale factor. The obtained results show that the g-essence model can describes the decelerated and accelerated expansion phases of the universe.